摘要
通过温室盆栽试验研究施用不同量及不同比例粉煤灰钝化污泥对土壤理化性质、玉米生长和重金属累积的影响。试验结果表明：施用粉煤灰钝化污泥能显著提高酸性土壤的ｐＨ值和Ｃａ、Ｍｇ、Ｂ的含量，降低土壤的电导率和重金属的有效性。施用合适比例和合适量的粉煤灰钝化污泥能明显改善土壤的物理性质，增加土壤的Ｎ、Ｐ养分，并能显著提高玉米地上部干物重。１０％和５％是高施用量和低施用量时合适的粉煤灰加入比例，施用此比例粉煤灰钝化污泥时，玉米的地上部干物重显著高于施用化肥的对照土壤或于之相当，且没有硼和重金属的毒害。
A greenhouse experiment was performed to understand the effects of application of sewage sludge stabilized by coal fly ash on soil physicochemical properties and heavy metal accumulation in corn.It was indicated that soil DTPA extractable Cu,Zn,Pb,Cd and Ni contents and soil EC decreased while soil soluble B,Ca and Mg contents and pH increased significantly with an increase in ash amendment at a soil mixing ratio of either 1∶1 or 1∶5(V/V).Application of sewage sludge stabilized by coal fly ash significantly improved the soil physical properties and the yields of corn.Pot with 5% ash sludge mixture at 1∶5(V/V)soil mixing ratio had the highest dry weight yield which was even better than that of the soil with fertilizer treatment.Zn,Cu and Cd concentrations in shoot tissue decreased with increasing amounts of ash amendment for both soil mixing ratios.This indicates the beneficial effect of the ash amendment in suppressing the availability of these heavy metals.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1997年第4期321-325,共5页
China Environmental Science
基金
香港Croucher基金
香港浸会大学科研基金
关键词
污泥
粉煤灰
玉米
土壤
化学性质
物理性质
sewage sludge,coal fly ash,heavy metal stabilization,corn.
